Unclassified 



SECURITY CLASSIFICATION OF THIS PAGEfHTien Dale Entered) 



20. Continued 



results and model predictions for elongation and rotation were in good agreement for 

 the case of a double-armored cable. Experimental and predicted values of rotation for 

 a 3 x 19 nonrotating, multistrand cable were not in good agreement, apparently because 

 of the difficulty in modeling the complex construction of the cable. Two types of cables 

 were subjected to constant tension and were twisted until kinks developed. These test 

 results show that the buckling criterion for a solid rod can be used as a criterion for 

 kinking of double-armored and multistrand cables. 



Library Card 



. Civil Engineering Laboratory 



' KINK FORMATION AND ROTATIONAL RESPONSE 



| OF SINGLE AND MULTISTRAND ELECTROMECHANICAL 



CABLES (Final), by F. C. Liu 

 I TN-1403 37 p. illus October 1975 Unclassified 



| 1. Electromechanical cables 2. Single and mlutistrand I. YF52. 556.004.01.001 



Mathematical models for double-armored and multistrand cables were formulated to 

 simulate straight cable sections. Numerical solutions for free-end and fixed-end cables under 

 tension were obtained with a computer. Controlled cable tests were conducted to generate data 

 on the rotational behavior of six cables of different size and construction. Part of the data was 

 ' used to compare with results from the analytical models. Experimental results and model 

 I predictions for elongation and rotation were in good agreement for the case of a double-armored 

 cable. Experimental and predicted values of rotation for a 3 x 19 nonrotating, multistrand cable 

 I were not in good agreement, apparently because of the difficulty in modeling the complex con- 

 I struction of the cable. Two types of cables were subjected to constant tension and were twisted 

 until kinks developed. These test results show that the buckling criterion for a solid rod can be 

 I used as a criterion for kinking of double-armored and multistrand cables. 



Unclassified 



CLASSIFICATION OF Tl 



